When a full Nidhogg grows restless and begins to move about, his scales turn a bright, burning red. The scales then sizzle with blazing heat, burning all vegetation around him and scalding the ground beneath his feet.

In Norse mythology, Níðhöggr (Malice Striker, often anglicized to Nidhogg) is a dragon who gnaws at a root of the World Tree, Yggdrasill. In the mythology, the Nidhogg is said to be controlled by only one person, the Norse goddess named Hel.